Invisible heart mug
Claims
The ornamental design for an invisible heart mug, as shown and described.
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Type: Grant
Filed: Mar 31, 2014
Date of Patent: Mar 15, 2016
Inventors: Zheng Yu Chen (Highlands Ranch, CO), Qun Lu (Highlands Ranch, CO)
Primary Examiner: Marianne Pandozzi
Application Number: 29/486,536